Question # 1

For a particular halogen, the reactivity of alkyl halides

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remains same with C-increase

decreases with C-increase

increases with C-increase

decreases with C-decrease

Denaturation of proteins is often characterised by

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Loss of biological activity

Aiways being irreversible

Being ereater the lower the temperature

Changes in primary structure

Amino acids react together to form the primary structure of proteins which is accompanied by

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addition of water

addition of ammonia

removal of ammonia

removal of water

An example of simple protein is

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lipoprotein

Cholesterol

lecithin

globulin

Dehydrogenase is an example of

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ligase

oxidoreductase

lyase

hydrolase

An example of regulatory protein is

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nucleoprotein

hemoglobin

lactoglobulin

thyroxine

Based on the physico-chemical properties, proteins may be classified into the following types

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Simple proteins

Compound proteins

Derived proteins

All of the above

L-asparginase is helpful in treatment of

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skin disease

blood cancer

heart failure

obstructive jaundice

Which of the following bond is responsible for joining the amino acids in proteins?

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Metallic Bond

Di sulfide bond

Peptide Bond

Which of the following is not a property of enzymes?

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extraordinary speciffcity

reversibility of reactions

high efficiency

minimum activity at optimum T

The proteins which give an amino acid and non-protein group on hydrolysis are known as

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Derived protein

Albumins

Conjugated simple protein

Conjugated protein

The most abundant protein in the human body is

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Collagen

Keratin

Myosin

Albumin

The enzymes that catalyse the addition or removal of ammonia are:

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Lyases

Ligases

Transferases

Kinses

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

Third order of protein structure refers to

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Bending of protein chain

Three-dimensional structure of protein

Number and sequence of amino acids

Site of disulphide bonds

Increased concentration of enzyme alkaline phosphatase is a sign of

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hemophilia

heart disease

thrombosis

rickets

The structure of protein helps protein to

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be in proper shape

attach substrate

perform is function

All of these

Enzymes are

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simple proteins

derived proteins

compound proteins

conjugated proteins

UV rays inactivate enzymes because they

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change sequence of amino acids of enzymes

They add prosthetic group to them

They increase their specificity

affect structure of enzymes

Enzymes have been classified on the basis of

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protein structure

prosthetic groups

type of reaction they catalyse

bonding in them

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